Effective ways to resolve the ajax problem of not appearing in the console

I am facing an issue with my simple ajax call in a Java spring boot application. The call is made to a controller method and the returned value should be displayed in the front-end console. However, after running the code, it shows a status of 400 but nothing is appearing in the console. I'm unsure if I missed something or if there is a setup error causing this lack of data being passed back.

JQuery:

$(".modalPathContentBtn").on("click", function(event) {

                getSecondQuery();

            });

            function getSecondQuery() {

                var search2 = {
                    "dtoTiername" : "Test"

                }

                $.ajax({
                    type : "POST",
                    contentType : 'application/json; charset=utf-8',
                    dataType : 'json',
                    url : "/ajax/mqlGetSecondQuery",
                    data : JSON.stringify(search2),
                    success : function(result) {

                        console.log("It works: " + result);

                    }

                });
            }

Java:

@RequestMapping(value = "/ajax/mqlGetSecondQuery", method = RequestMethod.POST)
    public @ResponseBody String sendSecondQuery(@RequestBody TestApp mTestApp, HttpServletRequest request) {
        String pathVal = mTestApp.getDtoTiername();

        System.out.println("Test of if it is getting to this part of the code");

return "randomString";


    }

Answer №1

If your request fails with a status code of 400, it means that the Ajax call is not successful and the 'success' function will not be triggered. To handle this situation, you should include a 'fail' handler in your code. Here's an example:

$.ajax({
  type: "POST",
  contentType: 'application/json; charset=utf-8',
  dataType: 'json',
  url: "/ajax/mqlGetSecondQuery",
  data: JSON.stringify(search2),
  success: function(result) {
    console.log("It works: " + result);
  },
  fail: function(err) {
    console.log(err)
  }
});

This code snippet may not be exact syntax, but the concept is to ensure you have a fail handler for handling unsuccessful Ajax requests.

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